CVE-2024-0933VulnerabilityPublished 26 Jan 2024Updated 29 May 2025

CVE-2024-0933: Niushop B2B2C · Unrestricted Upload

Affects Niushop B2B2CSource CVE Database V5

Not known to be exploited · CVSS 6.3 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

6.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 26 Jan 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Niushop B2B2C	Affected =5	Fixed in–

AI-suggested

These include: 1) Restricting file upload functionality to authenticated and authorized users only, minimizing the attack surface. 2) Implementing strict server-side validation to allow only safe file types (e.g., images) and enforcing file size limits. 3) Employing content scanning tools to detect and block malicious payloads within uploaded files. 4) Configuring web server permissions to prevent execution of uploaded files in upload directories (e.g., disabling script execution). 5) Monitoring logs and network traffic for unusual upload activity or access patterns. 6) Isolating the upload functionality within a sandboxed environment or separate service to limit potential damage. 7) Considering temporary disabling of file upload features if feasible until a patch is released. 8) Engaging with Niushop vendors or community for updates and patches. These measures go beyond generic advice by focusing on practical, layered defenses tailored to the specific vulnerability context.

Description

A vulnerability was found in Niushop B2B2C V5 and classified as critical. Affected by this issue is some unknown functionality of the file \app\model\Upload.php. The manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-252140. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations using Niushop B2B2C V5, this vulnerability poses a significant risk. Given the B2B2C platform's role in managing business-to-business and business-to-consumer transactions, exploitation could lead to unauthorized access to sensitive customer data, financial information, and business operations. Attackers could upload web shells or malware, enabling persistent access or lateral movement within corporate networks. This could result in data breaches, reputational damage, regulatory non-compliance (e.g., GDPR violations), and operational downtime. The medium CVSS score may underestimate the real-world impact, as unrestricted upload vulnerabilities often serve as initial vectors for more severe attacks. European companies in retail, e-commerce, and supply chain sectors relying on Niushop B2B2C are particularly vulnerable, potentially affecting their customers and partners across the continent.

Summary

CVE-2024-0933 is a critical vulnerability identified in Niushop B2B2C version 5, specifically related to an unrestricted file upload flaw located in the \app\model\Upload.php component. This vulnerability falls under CWE-434, which concerns improper restrictions on file uploads. The flaw allows an attacker with at least low-level privileges (PR:L) to remotely upload arbitrary files without sufficient validation or restriction. The vulnerability does not require user interaction (UI:N) and can be exploited over the network (AV:N) with low attack complexity (AC:L). The impact of successful exploitation includes potential confidentiality, integrity, and availability compromises, as attackers may upload malicious scripts or executables leading to remote code execution, data leakage, or service disruption. Although the CVSS v3.1 score is 6.3 (medium severity), the unrestricted upload nature combined with remote exploitation capability elevates the risk profile, especially in environments where the application handles sensitive business or customer data. The vendor has not responded to disclosure attempts, and no official patches are currently available, increasing the urgency for organizations to implement mitigations. Public exploit details have been disclosed, though no active exploitation in the wild has been reported yet.

CWE-434Unrestricted Upload of File with Dangerous Type (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #12OWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
Architecture and Design
Generate a new, unique filename for an uploaded file instead of using the user-supplied filename, so that no external input is used at all.
Architecture and Design · Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Architecture and Design
Consider storing the uploaded files outside of the web document root entirely. Then, use other mechanisms to deliver the files dynamically.
OWASP Cheat Sheets
Server Side Request Forgery Prevention (opens in a new tab)
Web Service Security (opens in a new tab)
Third Party Javascript Management (opens in a new tab)
File Upload (opens in a new tab)
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V12.5.2 (opens in a new tab)
V13.1.5 (opens in a new tab)
V12.2.1 (opens in a new tab)
Attack patterns
Accessing Functionality Not Properly Constrained by ACLs (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Jul 2025, 23:42 UTC

WeaknessesCWE-434

Technical details

References

Community reviews

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